Gorilla Glue Auto (Gorilla Gale)

Purchased a new night which is 24 inches from the plant. The bottom two leaves have started to turn slightly yellow. The PH levels have not changed. I may have over watered, but I don’t believe I did. Not quite sure what is going on here. She has taken off in growth this week compared to the last. She is on a 18hour light schedule and taken out into the sun from 12pm to 6pm and then back under the lights. I am not overly sure of how much water is required.